workers failed while applying patch 18328966

@ICX

when applying patch 18328966 , below two problems encountered:
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PROBLEM 1) adwork001.log, adwork002.log - problem1.tar.gz
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ATTENTION: All workers either have failed or are waiting:

           FAILED: file icxblknt.wft on worker  1.
           FAILED: file POSSPAPM.wft on worker  2.

ATTENTION: Please fix the above failed worker(s) so the manager can continue.


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adwork001.log:
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/tprt1i/applmgr/1200/fnd/12.0.0/bin/WFLOAD &ui_apps 0 Y UPGRADE @ICX:patch/115/import/US/icxblknt.wft
Log filename : /tprt1i/applmgr/1200/admin/TPRT1I_BALANCE/log/l3831701.req


Report filename : /tprt1i/applmgr/1200/admin/TPRT1I_BALANCE/out/o3831701.out
wferr:
  - 1602: Could not save.
  - 1400: Could not save to database. MODE=UPGRADE EFFDATE=<null>